Improvement in cylinders of steam-engines



G. H. GORLLSS. Gylnderof Steam-Engines.

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Patented May 27,1879.'

UNITED STATES APM.Enr

GEORGE H. OORLISS, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN CYLINDERS OF STEAM-ENGINES.

Specification forming part of Letters Patent No. 215,807, dated May 27,1879; application filed February 6, 1879.

To all whom fit may concern.-

Beit known that I, GEORGE H. (loRLIss, of the city and county ofProvidence, in the State of Rhode Island, have invented certain new anduseful Improvements relating to the Cylinders of Steam-Engines; and I dohereby declare that the following is a full, clear, and exactdescription thereof.

My improved cylinder is provided with a ange at each end, constructedand arranged for making a steam-tight joint with an exterior cylinder orcasing, whereby an annular space is obtained between the two, which,being filled with steam, constitutes a so-called steam-jacket.

The lian ges are so f'ormed that by their flexibility theycanaccommodatethemselves,with ou danger of breaking, to the expansion andcontraction due to considerable differences in temperature between theouter and inner cylinders.

I make the steam cylinder and casing in separate pieces mainly to securewith greater certainty reliable castings of uniform thick` ness.

Screw-threads are cut upon the periphery of the flanges, correspondingto interior threads cut upon the easing.

In order to facilitate the placing of the casing upon the cylinder, thediameterof one of the threaded flanges is made less than that of theother by an amountslightlyexceeding the depth of the thread, thecorresponding threaded ends of the casing being similarly modified, soas fo lit the same After the casing is screwed upon the flanges, like anut upon a bolt, the thread-joints are perfected -by compressing-bandsapplied upon each end of the casing directly over the threaded parts.

The flanges at each end of the cylinder pre sent a section in the formof an elbow, one eX- tremity of which section joins to the ordinary angeof the steam-cylinder, while the other makes joint with the casing. Onepart of' the section is parallel to the main cylinder-section, while theother stands atright angles to it. The rst-mentioned part of the flangeis exible in one direction and the second in the other. The oneaccommodates expansion in a transverse direction and the other in alongitudinal direction.

Steam is admitted to the annular space or steam-jacket, and an exit isprovided for the water of' condensation by suitable pipe-connections.

The accompanying drawing forms a part of this specification, andrepresents what I con.- sider the best means of carrying out the in-Ivention.

c is the body of the steam-cylinder, and al a2 the elastic flanges. a3is the outer casing, and a4 a4 the compressing-bands. Screwthreads arecut upon the periphery of the elastic anges, as shown at a5 c5,corresponding to interior screw-threads cut upon the casing a3.

In order to facilitate the placing of the casin g upon the cylinder inthe process of construe tion, I make the diameter ofthe elastic threadedlian ge al larger than that of the corresponding ange c2 by an amountslightly in excess of the depth of the screw-thread a5, the corresponding ends of the casing being fitted to the same. After the casing a3 hasbeen screwed upon the flanges al a2, like a nut upon a bolt, thescrew-thread joints a5 are perfected by the compressing-bands af a4,applied upon each end of' the casing directly over the threaded parts a5a5.

It will be observed that thelanges a1 a at each end of' the cylinderpresent a section in the form of' an elbow, one extremity of` the elbowbeing joined to the ordinary lflange of the cylinder at co6, while theother extremity makes joint with the casing at c5.

I will mark the ordinary flange a6 at each end ofthe cylinder. It isadapted to perform its usual function of holding the bolts a, whichconfine the cylinder ends am, in addition to its function of joining tothe elastic flange al or co2, and forming one end ofthe thin exten sionof the steam-jacket @which by my invention is allowed to extend to theflange a without interfering with the ordinary uses and funcA tions ofthe latter. i

One part, al, of the section is parallel to thc cylinder-body section a,while the other part, a3, stands at right angles toit. The part al isflexible in one direction, and the part as in.

the other direction. The part a" accommodates expansion and contractionin a transverse direction, and the part a8 in a longitudinal direction.

Steam is admitted to the annular space or steam-j acket a9, and anescape is provided for the products of condensation by suitablepipeconnections. (Not shown.)

Modiiications may be madel in the lforni of many of the parts.

The flanges al a2, joining the cylinder a and casing a3, may becorrugatedorl otherwise varied in form.

The compressing-bands a4 a4 may bc applied by shrinking them on or byforcing them on.

1n" the latter ease it will be understood that the bearing-surfaces amam should be slightly conical.

I claim as my invention- 1.A steam-cylinder, a, and anouter casing,I a3,joined by elastic flanges al a2, formed with an elbow-section, a7 a,adapted to allow of yielding elasticall y both in the radial andlongitudinal direction, as herein' specied.

2. A jacketed cylinder for a steam-engine, constructed with the exteriorpart, a3, in a piece separate from the cylinder and united byscrew-threads a5, as herein set forth and described.

3. A steam-cylinder having flanges al a2 joined tothe ordinary flangesa6, in the positions shown, and adapted to allow the steamjacket toextend quite to theend of the cylinder, and to allow the ordinary flangeto serve its usual functions, as herein specied.

4. In combination with the cylinder a, ontside casing, a3, elasticflanges aI a2, and screwthreads a5, the compressing-bands a, adapted toserve as herein specified.

In testimony whereof I have hereunto set `my hand this lst day of'February, 1879, in the presence of ytwo subscribing witnesses.

GEO. H; GORLISS.

Witnesses: I i

JEssE WALRATH, GEORGE A. DODGE.

